#!/bin/bash
#
# An example hook script to verify what is about to be committed.
# Called by "git commit" with no arguments.  The hook should
# exit with non-zero status after issuing an appropriate message if
# it wants to stop the commit.
#
# To enable this hook, rename this file to "pre-commit".

if git rev-parse --verify HEAD >/dev/null 2>&1
then
    against=$(git merge-base --fork-point main)
else
    # Initial commit: diff against an git hash-object -t tree /dev/nullempty tree object
    against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
fi

# If you want to allow non-ASCII filenames set this variable to true.
allownonascii=$(git config --bool hooks.allownonascii)

# Redirect output to stderr.
exec 1>&2

# Cross platform projects tend to avoid non-ASCII filenames; prevent
# them from being added to the repository. We exploit the fact that the
# printable range starts at the space character and ends with tilde.
if test $(git diff --cached --name-only --diff-filter=A -z $against |
         LC_ALL=C tr -d '[ -~]\0' | wc -c) != 0
then
    cat <<\EOF
Error: Attempt to add a non-ASCII file name.
EOF
    exit 1
fi

MIRROR=/tmp/${USER}/argobots-tmp-mirror
TMP_FILENAME=/tmp/${USER}/argobots-tmp-file

# Checkout a copy of the current index into MIRROR
git checkout-index --prefix=$MIRROR/ -af

# Remove files from MIRROR which are no longer present in the index
git diff-index --cached --name-only --diff-filter=D -z $against | \
    (cd $MIRROR && xargs -0 rm -f --)

# This will check the previous commit again when not amending a commit, but that
# should be ok if the patches are correct.
filestring=`git diff --cached --name-only --diff-filter=ACM $against`

# Everything else happens in the temporary build tree
pushd $MIRROR > /dev/null

ret=0

# This won't work if we ever have a file with a space in the name
for file in $filestring
do
    if [[ ($file == *.c || $file == *.h || $file == *.c.in || $file == *.h.in)
          && !($file == *abt.h.in) ]]; then
        cp ${file} ${TMP_FILENAME}
        maint/code-cleanup.sh ${file}
        git --no-pager diff ${TMP_FILENAME} ${file}
        if [ $? != 0 ] ; then
            ret=1
        fi
    fi
done

rm -rf ${MIRROR} ${TMP_FILENAME}

if [ $ret != 0 ] ; then
    RED='\033[0;31m'
    NC='\033[0m' # No Color
    echo -e "${RED}== CODE CLEANUP SCRIPT FAILED ==${NC}"
    exit $ret
fi
